| ESS | ISSP | HB | |
| Universe | 15 years and over | 18 years and over | 18 years and over |
| Sampling | Two stage | Two stage | Three stage |
| Sampling units | Census blocks | Census blocks | Municipalities and census blocks |
| Sampling units selection | PPS | PPS | PPS |
| Final units selection | Systematic | Systematic | Random routes and quotes |
| Sample size | 2.865 | 4.000 | 7.800 |
| Final respondents | 1.885 | 2.650 | 7.750 |